Dowel.



T. TISSIER.

' DOWBL.

APPLICATION FILED NOV. 27, 190 8.

m 4 a M m 5 1 m 1 /7 W/ V/ 1 N, N F a a m g 5 h m w WITNESSES gZazdmuATTORNEYS mortise and tenon With.

Tnom o TISSIER, or BUENOS AIRES, ARGENTINA.

DDWEL.

Specification of Letters Patent.

Patented Sept. 16, 1 913.

Application filed November 27, 1908. Serial No. 464,806.

To all whom '26 may concern:

Bejitknown that I, TE6F1L0 Tissmn, of Buenos Aires, Argentina, haveinvented a new and Improved Dowel, of which'the following is a full,clear, and exact description. My invention relates to dowels for cabinetwork and for all other purposes where two wooden portions are to besecured together,

and has tor its ob ect to provide a dowel by means of which the usualand well known joint may be dispensed A further object of the inventionis to prov de a dowel which is simple and-inexpensive.

A practical embodiment of the invention is shown in the accompany ngdrawing,

of the expansiblesleeve-portion of the dowel.

Fig. 2 is a transverse section of the same.

Fig. 3 is a sectional view showing the improvement applied and partlyapplied. Fig. 4 is a sectional view showing the application of theimprovement to pieces which are comparatively small. Fig. 5 is a sideview, the sleeve being in section, of a modification. Fig. 6 is atransverse section of the same; and Fig. 7 is an elevation of the dowelbody shown in Figs. 5 and 6, the parts being separated.

Referring to Figs. 1, Qand 3 of the drawing, A is the dowel formed ofthe metallic expansible sleeve 0 and Wooden body portion 6. The sleevea'which is preferably of sheet metal, is split longitudinally so as topermit it to expand and is rovided onits outer face with teeth or proections a. The teeth are preferably formed by punching a sheet metalplate which is to form the sleeve preparatory to forming it into asleeve, so that tubular open-ended projections are formed, as shown. Thewooden body portion I) of the dowel preferably has one end notched asshown at b for a purpose hereinafter described.

In use sleeve a is inserted in the registering holes of thewooden parts1 and 2 to be united, with the outerend of the sleeve below the face ofthe part 1, as shown in Fig. 3, and then the wooden body portion 6 whichhas curely hold the sleeve in the said opening,

and at .the same time, the glue on the body portion will enter the teethor projections, so that the said body portion is securely held in thesleeve. Some of the glue on the body 6 will also enter the notch at theinner end of the body and assist in holding the said bodyinthe sleeve.After the body has been driven in o the sleeve a, a wedge c is driveninto the said body so as to spread the outer end thereof and completelyfill the opening. By the employment of the wedge and placing the sleevein tl 1e opening, so that its outer end is below the face of the parts 1or 3, the said parts can be readily dressed or cleaned off. Inconnecting large pieces as shown in Fig. 3, the part 1 is preferablynotched or recessed as shown to receive the as shown in Fig. 4, this isunnecessary.

In Figs. 5, 6 and 7 I have shown a dowel B especially adapted forsecuring parts of hard wood or the parts of heavier work,

In this such as doors or window frames. case the sleeve (Z is formedwith teeth (Z and in other respects is similar to that shown in theother views, except that it is of heavier metal, but the dowel body 6 isof iron and formed of three members f, g, It. The members f and g areapproximately semicircular and the part It is slightly tapering. In thisform of the dowel, the sleeve is inserted in the opening of the parts tobe united and after the parts f and'g of the bodyhave been inserted inthe sleeve, the part b is driven in between the said parts f and g.

By the employment of the improved dowel in place of the mortise andtenon, the weakening of the parts due to the mortise and tenon and thepegs which secure the tenon in the mortise, is avoided, and the partscan be joined at a perfect right anglewith much less trouble and time.

I claim-- V 1. A dowel for securing two parts of a wooden structuretogether, comprising an expansible metal sleeve having teeth orprojections on its periphery, and a dowel body inthe sleeve and of aslightly greater diambody in said sleeve, said dowel body consist- 10eter tlian the sleeve, whereby when the dowel ing of three sections. vis applied the sleeve will be expanded and In testimony that I claim theforegoing I its teeth or projections forced into the parts have hereuntoset my hand. i (fOnllCCtCd by Said dowel.

2. A dowel for securing two parts of a \yooden structure together,compnslng an VVltnessesr expansible sleeve provided with teeth orFEDERIOoSCI-IUTZ LLAMOS,

projections on its periphery, and a dowel CELESTINoLAFAILLE;

